US9212495B2 - Work machine - Google Patents

Work machine Download PDF

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Publication number
US9212495B2
US9212495B2 US14/239,889 US201214239889A US9212495B2 US 9212495 B2 US9212495 B2 US 9212495B2 US 201214239889 A US201214239889 A US 201214239889A US 9212495 B2 US9212495 B2 US 9212495B2
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United States
Prior art keywords
boom
attachment
arm
work
inter
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US14/239,889
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US20140205413A1 (en
Inventor
Takanobu Nakamura
Yasushi Shigenari
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Kobelco Construction Machinery Co Ltd
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Kobelco Construction Machinery Co Ltd
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Assigned to KOBELCO CONSTRUCTION MACHINERY CO., LTD. reassignment KOBELCO CONSTRUCTION MACHINERY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NAKAMURA, TAKANOBU, SHIGENARI, YASUSHI
Publication of US20140205413A1 publication Critical patent/US20140205413A1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/08—Wrecking of buildings
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/302—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom with an additional link
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/369—Devices to connect parts of a boom or an arm
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/425—Drive systems for dipper-arms, backhoes or the like
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/965—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements of metal-cutting or concrete-crushing implements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2275—Hoses and supports therefor and protection therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/08—Wrecking of buildings
    • E04G23/082—Wrecking of buildings using shears, breakers, jaws and the like

Definitions

  • the present invention relates to a work machine such as a demolishing machine that includes a base machine and a work attachment attached to the base machine.
  • a demolishing machine in which a work attachment is attached to a base machine
  • various work machines such as a demolishing machine in which a work attachment is attached to a base machine
  • a demolishing machine with a super long attachment used in demolishing a high-rise building as disclosed in Patent Document 1 is configured to be able to receive or transport a long work attachment 4 in a folded state.
  • this demolishing machine includes a base machine 3 and a work attachment 4 attached to a front part thereof.
  • the base machine 3 includes a crawler-type lower traveling body 1 and an upper turning body 2 .
  • the upper turning body 2 is mounted on the lower traveling body 1 so as to be revolvable about a vertical axis.
  • the work attachment 4 includes a boom 5 , a short inter-boom 6 , an arm 7 , and a work device 8 .
  • the boom 5 is attached to the base machine 3 , specifically to the upper turning body 2 of the base machine 3 , so as to be freely raised and lowered.
  • the inter-boom 6 is attached to a distal end of the boom 5 so as to be rotatable about a horizontal axis in order to expand the working range of the work attachment 4 .
  • the arm 7 is attached to a distal end of the inter-boom 6 so as to be rotatable about the horizontal axis.
  • the work device 8 is attached to a distal end of the arm 7 .
  • the work device 8 illustrated in FIG. 8 is a crushing device called a nibbler.
  • the boom 5 includes a main boom 5 a and a front boom 5 b that is detachably connected to an upper end side thereof.
  • the demolishing machine is transported, the demolishing machine is disassembled into the base machine 3 and the work attachment 4 .
  • the main boom 5 a is transported in a state of being attached to the base machine 3 .
  • front boom 5 b is generally formed by detachably connecting a plurality of stages of booms, a single-stage front boom is illustrated for the sake of simplicity.
  • a boom cylinder 9 that raises and lowers the boom 5 and the entire attachment including the boom 5
  • an inter-boom cylinder 10 that operates the inter-boom 6
  • an arm cylinder 11 that operates the arm 7
  • a work device cylinder 12 that operates the work device 8 are provided as a cylinder such as a hydraulic cylinder that operates the work attachment 4 .
  • the inter-boom cylinder 10 is provided between the boom 5 (specifically, the front boom 5 b of the boom 5 ) and the inter-boom 6
  • the arm cylinder 11 is provided between the inter-boom 6 and the arm 7 , respectively, on the belly side (that is, the side facing the front side (the direction indicated by arrow F) of the base machine 3 ) of the attachment.
  • the work device cylinder 12 is attached to a distal end side of the arm 7 on the back side (that is, the side facing the backward side (the direction indicated by arrow R) of the base machine 3 ) of the work attachment 4 in a state where the work attachment 4 is extended to stand up.
  • the work attachment 4 When such a demolishing machine with a super long attachment is disassembled, as illustrated in FIG. 8 (see the solid-line portion) and FIG. 9 , the work attachment 4 is placed on a ground in a three-fold state so that the boom 5 is disposed above the inter-boom 6 and the arm 7 is disposed below the inter-boom 6 . In this state, as described above, the demolishing machine is transported in a state of being separated into a group composed of the base machine 3 and the main boom 5 a and a group composed of the work attachment 4 excluding the main boom 5 a . The group of the work attachment 4 is transported in a posture where the entire group is folded.
  • a structure may be taken into consideration in which in a state where the attachment 4 is in a folded posture, the work device cylinder 12 is attached to a surface facing upward of the arm 7 , a surface facing downward of the arm 7 is flat, and the flat surface is placed directly on a ground.
  • the position of the work device cylinder 12 in relation to the arm 7 is greatly different from that of a conventional work machine, a method of operating the demolishing machine is changed greatly, which may influence the operability during demolishing.
  • An object of the present invention is to provide a work machine capable of decreasing the height of the work attachment in a folded state and suppressing the influence on the operability during demolishing.
  • a work machine of the present invention is a work machine in which a work attachment is attached to a base machine, the work attachment including: a boom attached to the base machine so as to be raised and lowered; an inter-boom attached to a distal end of the boom so as to be rotatable about a horizontal axis; an arm attached to a distal end of the inter-boom so as to be rotatable about the horizontal axis; a work device attached to a distal end of the arm; an inter-boom cylinder provided on a belly side of the work attachment and between the boom and the inter-boom so as to rotate the inter-boom; an arm cylinder provided on the belly side of the work attachment and between the inter-boom and the arm so as to move the arm; and a work device cylinder provided in a portion of a back side of the work attachment close to the distal end of the arm, wherein the work attachment can be folded in a three-fold manner into such an attachment folded posture that the boom is disposed on the upper side of
  • the work attachment can be folded in a three-fold manner into such an attachment folded posture that the boom is disposed above the inter-boom and the arm is disposed below the inter-boom.
  • the arm has the surface facing downward when the attachment is in the attachment folded posture, and the surface includes the flat arm contact surface capable of making contact with the mounting surface on which the work attachment is mounted, and the attachment surface that is positioned closer to the distal end of the arm than the arm contact surface and extends in the direction away from the mounting surface.
  • the work device cylinder is attached to the attachment surface so as not to make contact with the mounting surface when the arm contact surface makes contact with the mounting surface such as a ground or a floor.
  • the attachment when the attachment is in the attachment folded posture, the space occupied by the work device cylinder decreases and the height of the attachment in the folded posture can be decreased. Moreover, the attachment can be mounted on a predetermined ground, a predetermined floor, or the like in a stable state. Further, since the position at which the work device cylinder is attached to the arm is the same as the conventional demolishing machine, it is not necessary to change a method of operating the demolishing machine and to suppress the influence on the operability during demolishing.
  • the inter-boom cylinder is attached between the inter-boom and the boom-side sloped surface formed close to the distal end of the boom
  • the arm cylinder is attached between the inter-boom and the arm-side sloped surface formed on the base side of the arm. Due to this, when the attachment is in the attachment folded posture, the inter-boom cylinder and the arm cylinder are received between the boom-side sloped surface and the arm-side sloped surface.
  • the boom upper surface of the boom facing upward when the attachment is in the attachment folded posture is more parallel to the arm contact surface than the boom-side sloped surface and the arm-side sloped surface or is parallel to the arm contact surface when the attachment is in the attachment folded posture. Due to this, it is possible to decrease the height of the attachment in the folded posture as compared to when the boom upper surface is sloped with respect to the arm contact surface.
  • the inter-boom cylinder and the arm cylinder are disposed so as to cross each other in a side view of the work attachment when the work attachment is in the attachment folded posture.
  • the inter-boom cylinder and the arm cylinder are disposed so as to cross each other in a side view of the work attachment when the work attachment is in the attachment folded posture. Due to this, the space occupied by the inter-boom cylinder and the arm cylinder decreases when the attachment is in the attachment folded posture, and the height of the attachment in the folded posture can be decreased.
  • the boom has a boom-side facing surface that is disposed on the base side of the boom so as to face downward when the attachment is in the attachment folded posture
  • the arm has an arm-side facing surface that is disposed on the distal end side of the arm so as to face upward when the attachment is in the attachment folded posture
  • the boom-side facing surface and the arm-side facing surface face each other when the attachment is in the attachment folded posture
  • the boom-side facing surface is formed to be more parallel to the arm-side facing surface than the boom-side sloped surface and the arm-side sloped surface or to be parallel to the arm-side facing surface when the attachment is in the attachment folded posture.
  • the boom-side facing surface formed on the base side of the boom is more parallel to the arm-side facing surface formed close to the distal end of the arm than the boom-side sloped surface and the arm-side sloped surface or is parallel to the arm-side facing surface when the attachment is in the attachment folded posture. Due to this, it is possible to decrease the distance between the boom-side facing surface and the arm-side facing surface facing each other and to further decrease the height of the attachment in the folded posture.
  • the work attachment has a center of gravity that is positioned on the arm contact surface in the attachment folded posture.
  • the center of gravity of the work attachment is positioned on the arm contact surface in the folded posture. Due to this, the work attachment in the folded posture can be mounted on a predetermined ground or a predetermined floor in a more stable state.
  • FIG. 1 is a schematic side view illustrating a folded state of a demolishing machine with a super long attachment according to an embodiment of a work machine of the present invention.
  • FIG. 2 is a side view illustrating the folded state of a work attachment of FIG. 1 .
  • FIG. 3 is an enlarged side view illustrating the portions around an inter-boom in an extended state of the work attachment of FIG. 1 .
  • FIG. 4 is an enlarged plan view illustrating the portions around the inter-boom in an extended state of the work attachment of FIG. 1 .
  • FIG. 5 is a view of the work attachment of FIG. 2 when seen from the direction indicated by arrow A.
  • FIG. 6 is a cross-sectional view of the work attachment of FIG. 2 taken along line VI-VI.
  • FIG. 7 is a cross-sectional view of the work attachment of FIG. 2 taken along line VII-VII.
  • FIG. 8 is a schematic side view illustrating a conventional demolishing machine.
  • FIG. 9 is an enlarged view of part of FIG. 8 .
  • demolishing machine with a super long attachment is described as one embodiment of a work machine according to the present invention in conformity with the description of the background art.
  • a demolishing machine of the present embodiment includes a base machine 23 and a work attachment 24 .
  • the base machine 23 includes a crawler-type lower traveling body 21 and an upper turning body 22 .
  • the upper turning body 22 is mounted on the lower traveling body 21 so as to be revolvable about a vertical axis.
  • the work attachment 24 is attached to a front part of the base machine 23 .
  • the work attachment 24 includes a boom 25 , a short inter-boom 26 , an arm 27 , and a work device (not illustrated).
  • the boom 25 is attached to the base machine 23 , specifically to the upper turning body 22 , so as to be freely raised and lowered.
  • the boom 25 includes a main boom 25 a , a front boom 25 b , and an insert boom 25 c .
  • the inter-boom 26 is attached to a distal end portion 25 b 0 of the front boom 25 b so as to be rotatable in an up-down direction.
  • the arm 27 is attached to a distal end of the inter-boom 26 so that a rear end portion 27 h is rotatable in the up-down direction.
  • the work device (not illustrated) is attached to a distal end portion of the arm 27 .
  • a nibbler see reference numeral 8 of FIG. 8 ) or the like is used as the work device, for example.
  • a boom cylinder 29 that raises and lowers the boom 25 and the entire attachment including the boom 25
  • an inter-boom cylinder 30 that operates the inter-boom 26
  • an arm cylinder 31 that operates the arm 27
  • a work device cylinder 32 that operates the work device (not illustrated) are provided in the work attachment 24 as a cylinder that operates the work attachment 24 .
  • the inter-boom cylinder 30 and the arm cylinder 31 are provided between the boom 25 (specifically, the front boom 25 b ) and the inter-boom 26 and between the inter-boom 26 and the arm 27 , respectively, and are connected by attachment pins 40 a to 40 d described later so as to be rotatable.
  • the work device cylinder 32 is attached to a distal end side of the arm 27 on the back side (that is, the side facing the backward side (the direction indicated by arrow R) of the base machine 3 in a state where the attachment is extended to stand up as illustrated in FIG. 8 ) of the work attachment 24 .
  • the demolishing machine is transported in a state of being separated into a group composed of the base machine 23 and the main boom 25 a , a group composed of the work attachment 24 a excluding the main boom 25 a and the insert boom 25 c , and the insert boom 25 c . After transporting, the separated groups are assembled into the same state.
  • the above configuration is substantially the same as the conventional demolishing machine illustrated in FIGS. 8 and 9 .
  • the demolishing machine of the present embodiment is different from the conventional demolishing machine in the following respects:
  • the work device cylinder 32 is attached to an arm attachment surface 27 c that is disposed in a surface facing downward of the arm 27 in the attachment folded posture and extends upward more than an arm contact surface 27 b ;
  • a boom upper surface 25 b 2 facing upward when the attachment is in the attachment folded posture is more parallel to the arm contact surface 27 b than a boom-side sloped surface 25 b 4 and an arm-side sloped surface 27 e or is parallel to the arm contact surface 27 b .
  • two inter-boom cylinders 30 are connected to the inter-boom 26 by a first attachment pin 40 a described later so as to be separated from each other in a width direction of the inter-boom 26 .
  • one arm cylinder 31 is connected to a protruding portion 26 a (see FIG. 3 ) of the inter-boom 26 by a second attachment pin 40 b described later at a position sandwiched by the two inter-boom cylinders 30 .
  • the first attachment pin 40 a connects one end portion 30 a of the inter-boom cylinder 30 to the inter-boom 26 so as to be rotatable about the horizontal axis.
  • the first attachment pin 40 a is attached so as to move in a horizontal direction and to be inserted to and removed from a position close to the front side (the left side of FIG. 3 ) of the inter-boom 26 .
  • the second attachment pin 40 b connects one end portion 31 a of the arm cylinder 31 to a protruding portion 26 a protruding downward from a position close to the rear side (the right side of FIG. 3 ) of the inter-boom 26 so as to be rotatable about the horizontal axis.
  • the second attachment pin 40 b is attached so as to move in the horizontal direction and to be inserted to and removed from a position close to the rear side of the inter-boom 26 and lower than the first attachment pin 40 a.
  • a third attachment pin 40 c connects the other end portion 30 b of the inter-boom cylinder 30 to an attachment portion 25 b 1 protruding from a circumferential surface of the front boom 25 b so as to be rotatable about the horizontal axis.
  • the third attachment pin 40 c is attached so as to move in the horizontal direction and to be inserted to and removed from the front boom 25 b .
  • the front boom 25 b has in the front boom 25 b a boom-side sloped surface 25 b 4 that is provided on a distal end side of the front boom 25 b so as to be sloped downward as it advances toward a base side (the right side of FIG. 2 ) of the front boom 25 b in the attachment folded posture.
  • the attachment portion 25 b 1 is provided so as to protrude downward from the boom-side sloped surface 25 b 4 .
  • the inter-boom cylinder 30 is attached between the front boom-side sloped surface 25 b 4 and the inter-boom 26 .
  • a fourth attachment pin 40 d connects the other end portion 31 b of the arm cylinder 31 to an attachment portion 27 a protruding from the circumferential surface of the arm 27 so as to be rotatable about the horizontal axis.
  • the fourth attachment pin 40 d is attached so as to move in the horizontal direction and to be inserted to and removed from the arm 27 .
  • the arm 27 has an arm-side sloped surface 27 e that is provided on the base side of the arm 27 so as to be sloped upward as it advances toward and a distal end 27 g (the right side of FIG. 2 ) of the arm 27 on the upper side of the arm 27 in the attachment folded posture.
  • the attachment portion 27 a is provided so as to protrude upward from the arm-side sloped surface 27 e . With this configuration, the arm cylinder 31 is attached between the arm-side sloped surface 27 e and the inter-boom 26 .
  • the second attachment pin 40 b is disposed above the first attachment pin 40 a when seen from the side surface of the work attachment.
  • the inter-boom cylinder 30 and the arm cylinder 31 are disposed so as to cross each other.
  • the arm 27 has a surface facing downward when the attachment is in the attachment folded posture.
  • the surface includes the flat arm contact surface 27 b capable of making contact with a mounting surface G (for example, a ground or a floor) on which the attachment is mounted, and the attachment surface 27 c that is positioned closer to the distal end 27 g of the arm 27 than the arm contact surface 27 b and extends in a direction away from the mounting surface G.
  • a mounting surface G for example, a ground or a floor
  • the attachment surface 27 c is formed so as to be sloped greater in an upward direction B at a section closer to the distal end 27 g of the arm 27 than a section, in which the arm contact surface 27 b is formed, in the attachment folded posture.
  • the work device cylinder 32 is attached to the attachment surface 27 c so as not to make contact with the mounting surface G when the arm contact surface 27 b makes contact with the mounting surface G Specifically, as illustrated in FIG. 2 , a base-side end portion of the work device cylinder 32 is connected to the bracket 27 f attached to the attachment surface 27 c so as to be rotatable about the horizontal axis. Since the lower end of the bracket 27 f is positioned above the arm contact surface 27 b in the attachment folded posture, the bracket 27 f will not make contact with a ground or the like.
  • the distal end portion 32 b of a cylinder body 32 a of the work device cylinder 32 is linked to a portion close to the distal end 27 g of the arm 27 by a link arm 33 .
  • one end portion of the link arm 33 is connected to the distal end portion 32 b of the cylinder body 32 a of the work device cylinder 32 by a link pin 33 a so as to be rotatable about the horizontal axis.
  • the other end portion of the link arm 33 is connected to a portion close to the distal end 27 g of the arm 27 by a link pin 33 b so as to be rotatable about the horizontal axis.
  • a rod 32 c of the work device cylinder 32 can advance and retract in a front-rear direction of the cylinder body.
  • the boom upper surface 25 b 2 of the front boom 25 b facing upward when the attachment is in the attachment folded posture and the boom upper surface is formed to be more parallel to the arm contact surface 27 b than the boom-side sloped surface 25 b 4 and the arm-side sloped surface 27 e or to be parallel to the arm contact surface 27 b when the attachment is in the attachment folded posture. Due to this, it is possible to decrease the height H 2 of the attachment when it is in the folded posture.
  • the front boom 25 b has a boom-side facing surface 25 b 3 that is disposed on the base side (the right side of FIG. 2 ) of the front boom 25 b so as to face downward when the attachment is in the attachment folded posture.
  • the arm 27 has an arm-side facing surface 27 d that is disposed on the distal end 27 g side (the right side of FIG. 2 ) so as to face upward when the attachment is in the attachment folded posture.
  • the boom-side facing surface 25 b 3 and the arm-side facing surface 27 d face each other when the attachment is in the attachment folded posture.
  • the boom-side facing surface 25 b 3 is formed to be more parallel to the arm-side facing surface 27 d than the boom-side sloped surface 25 b 4 and the arm-side sloped surface 27 e or to be parallel to the arm-side facing surface 27 d when the attachment is in the attachment folded posture. Due to this, it is possible to decrease the distance between the boom-side facing surface 25 b 3 and the arm-side facing surface 27 d as compared to the conventional machine.
  • the arm-side facing surface 27 d is positioned closer to the distal end of the arm 27 than the arm-side sloped surface 27 e in which the attachment portion 27 a for connecting the arm cylinder 31 is formed.
  • the boom-side facing surface 25 b 3 is positioned closer to the base side of the folded state 25 b than the boom-side sloped surface 25 b 4 in which the attachment portion 25 b 1 for connecting the inter-boom cylinder 30 is formed.
  • the work attachment 24 illustrated in FIG. 2 is manufactured so that the center of gravity of the work attachment 24 is positioned on the arm contact surface 27 b in the attachment folded posture.
  • the work attachment 24 can be folded in a three-fold manner into such an attachment folded posture that the boom 25 b is disposed above the inter-boom 26 and the arm 27 is disposed below the inter-boom.
  • the arm 27 has a surface facing downward when the attachment is in the attachment folded posture.
  • the surface includes the flat arm contact surface 27 b capable of making contact with the mounting surface G (for example, a ground, a floor, or the like) on which the attachment is mounted, and the attachment surface 27 c that is positioned closer to the distal end 27 g of the arm 27 than the arm contact surface 27 b and extends in the direction away from the mounting surface G
  • the work device cylinder 32 is attached to the attachment surface 27 c so as not to make contact with the mounting surface G when the arm contact surface 27 b makes contact with the mounting surface G. Due to this, when the attachment 24 is in the attachment folded posture, the space occupied by the work device cylinder 32 decreases and the height of the attachment 24 in the folded posture can be decreased.
  • the attachment 24 can be mounted on the predetermined mounting surface G such as a ground, a floor, or the like in a stable state.
  • the position at which the work device cylinder 32 is attached to the arm 27 is the same as the conventional demolishing machine, it is not necessary to change a method of operating the demolishing machine and to suppress the influence on the operability during demolishing.
  • inter-boom cylinder 30 is attached between the inter-boom 26 and the boom-side sloped surface 25 b 4 formed close to the distal end of the front boom 25 b
  • the arm cylinder 31 is attached between the inter-boom 26 and the arm-side sloped surface 27 e formed on the base side of the arm 27 . Due to this, when the attachment 24 is in the folded posture, the inter-boom cylinder 30 and the arm cylinder 31 are received between the boom-side sloped surface 25 b 4 and the arm-side sloped surface 27 e in a state of crossing each other.
  • the boom upper surface 25 b 2 of the boom 27 facing upward when the attachment is in the attachment folded posture is more parallel to the arm contact surface 27 b than the boom-side sloped surface 25 b 4 and the arm-side sloped surface 27 e or is parallel to the arm contact surface 27 b when the attachment is in the attachment folded posture. Due to this, it is possible to decrease the overall height of the attachment in the folded posture as compared to when the boom upper surface 25 b 2 is sloped with respect to the arm contact surface 27 b.
  • the inter-boom cylinder 30 and the arm cylinder 31 are disposed so as to cross each other in a side view of the work attachment 24 when the work attachment 24 is in the attachment folded posture. Due to this, the space occupied by the inter-boom cylinder 30 and the arm cylinder 31 decreases when the attachment 24 is in the folded posture, and the height of the attachment 24 in the folded posture can be decreased.
  • the boom-side facing surface 25 b 3 formed on the base side of the front boom 25 b is more parallel to the arm-side facing surface 27 d formed close to the distal end 27 g of the arm 27 than the boom-side sloped surface 25 b 4 and the arm-side sloped surface 27 e or is parallel to the arm-side facing surface 27 d when the attachment is in the attachment folded posture. Due to this, it is possible to decrease the distance between the boom-side facing surface 25 b 3 and the arm-side facing surface 27 d facing each other and to further decrease the height of the attachment 24 in the folded posture.
  • the center of gravity of the work attachment 24 is positioned on the arm contact surface 27 b in the folded posture. Due to this, the work attachment 24 in the folded posture can be mounted on a predetermined ground or a predetermined floor in a more stable state.
  • a work machine of the present invention is a work machine in which a work attachment is attached to a base machine, the work attachment including: a boom attached to the base machine so as to be raised and lowered; an inter-boom attached to a distal end of the boom so as to be rotatable about a horizontal axis; an arm attached to a distal end of the inter-boom so as to be rotatable about the horizontal axis; a work device attached to a distal end of the arm; an inter-boom cylinder provided on a belly side of the work attachment and between the boom and the inter-boom so as to rotate the inter-boom; an arm cylinder provided on the belly side of the work attachment and between the inter-boom and the arm so as to move the arm; and a work device cylinder provided in a portion of a back side of the work attachment close to the distal end of the arm, wherein the work attachment can be folded in a three-fold manner into such an attachment folded posture that the boom is disposed on the upper side of
  • the work attachment can be folded in a three-fold manner into such an attachment folded posture that the boom is disposed above the inter-boom and the arm is disposed below the inter-boom.
  • the arm has the surface facing downward when the attachment is in the attachment folded posture, and the surface includes the flat arm contact surface capable of making contact with the mounting surface on which the work attachment is mounted, and the attachment surface that is positioned closer to the distal end of the arm than the arm contact surface and extends in the direction away from the mounting surface.
  • the work device cylinder is attached to the attachment surface so as not to make contact with the mounting surface when the arm contact surface makes contact with the mounting surface such as a ground or a floor.
  • the attachment when the attachment is in the attachment folded posture, the space occupied by the work device cylinder decreases and the height of the attachment in the folded posture can be decreased. Moreover, the attachment can be mounted on a predetermined ground, a predetermined floor, or the like in a stable state. Further, since the position at which the work device cylinder is attached to the arm is the same as the conventional demolishing machine, it is not necessary to change a method of operating the demolishing machine and to suppress the influence on the operability during demolishing.
  • the inter-boom cylinder is attached between the inter-boom and the boom-side sloped surface formed close to the distal end of the boom
  • the arm cylinder is attached between the inter-boom and the arm-side sloped surface formed on the base side of the arm. Due to this, when the attachment is in the attachment folded posture, the inter-boom cylinder and the arm cylinder are received between the boom-side sloped surface and the arm-side sloped surface.
  • the boom upper surface of the boom facing upward when the attachment is in the attachment folded posture is more parallel to the arm contact surface than the boom-side sloped surface and the arm-side sloped surface or is parallel to the arm contact surface when the attachment is in the attachment folded posture. Due to this, it is possible to decrease the height of the attachment in the folded posture as compared to when the boom upper surface is sloped with respect to the arm contact surface.
  • the work machine may be configured so that, the inter-boom cylinder and the arm cylinder are disposed so as to cross each other in a side view of the work attachment when the work attachment is in the attachment folded posture.t.
  • the inter-boom cylinder and the arm cylinder are disposed so as to cross each other in a side view of the work attachment when the work attachment is in the attachment folded posture. Due to this, the space occupied by the inter-boom cylinder and the arm cylinder decreases when the attachment is in the attachment folded posture, and the height of the attachment in the folded posture can be decreased.
  • the work machine may be configured so that the boom has a boom-side facing surface that is disposed on the base side of the boom so as to face downward when the attachment is in the attachment folded posture, the arm has an arm-side facing surface that is disposed on the distal end side of the arm so as to face upward when the attachment is in the attachment folded posture, the boom-side facing surface and the arm-side facing surface face each other when the attachment is in the attachment folded posture, and the boom-side facing surface is formed to be more parallel to the arm-side facing surface than the boom-side sloped surface and the arm-side sloped surface or to be parallel to the arm-side facing surface when the attachment is in the attachment folded posture.
  • the boom-side facing surface formed on the base side of the boom is more parallel to the arm-side facing surface formed close to the distal end of the arm than the boom-side sloped surface and the arm-side sloped surface or is parallel to the arm-side facing surface when the attachment is in the attachment folded posture. Due to this, it is possible to decrease the distance between the boom-side facing surface and the arm-side facing surface facing each other and to further decrease the height of the attachment in the folded posture.
  • the work machine may be configured so that the work attachment has a center of gravity that is positioned on the arm contact surface in the attachment folded posture.
  • the center of gravity of the work attachment is positioned on the arm contact surface in the attachment folded posture. Due to this, the work attachment in the folded posture can be mounted on a predetermined ground or a predetermined floor in a stable state.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Agricultural Machines (AREA)
  • Shovels (AREA)
US14/239,889 2011-08-24 2012-07-23 Work machine Active US9212495B2 (en)

Applications Claiming Priority (3)

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JP2011-182644 2011-08-24
JP2011182644A JP5708369B2 (ja) 2011-08-24 2011-08-24 作業機械
PCT/JP2012/004653 WO2013027328A1 (ja) 2011-08-24 2012-07-23 作業機械

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US9644032B2 (en) 2015-05-29 2017-05-09 Bristol-Myers Squibb Company Antibodies against OX40 and uses thereof

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JP6257500B2 (ja) * 2014-11-28 2018-01-10 日立建機株式会社 フロント装置の移送台
AT523111B1 (de) * 2019-10-30 2022-07-15 Werner Steininger Vorrichtung zum Schneiden und/oder Hantieren von Schnittgut

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US9644032B2 (en) 2015-05-29 2017-05-09 Bristol-Myers Squibb Company Antibodies against OX40 and uses thereof
US10683357B2 (en) 2015-05-29 2020-06-16 Bristol-Myers Squibb Company Antibodies against OX40 and uses thereof
US11466092B2 (en) 2015-05-29 2022-10-11 Bristol-Myers Squibb Company Antibodies against OX-40 and uses thereof

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CN103857861B (zh) 2016-03-02
EP2749714A1 (en) 2014-07-02
EP2749714A4 (en) 2015-05-13
CN103857861A (zh) 2014-06-11
WO2013027328A1 (ja) 2013-02-28
JP5708369B2 (ja) 2015-04-30
EP2749714B1 (en) 2017-06-21
JP2013044162A (ja) 2013-03-04
US20140205413A1 (en) 2014-07-24

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